Editing Simon Stevin (section)

=== Music theory ===
[[File:De Spiegheling der signconst.jpg|thumb|''Van de Spiegheling der singconst''.]]
The first mention of equal temperament related to the [[twelfth root of two]] in the West appeared in Simon Stevin's unfinished manuscript ''Van de Spiegheling der singconst ''(ca 1605) published posthumously three hundred years later in 1884;<ref>{{cite web |url=http://diapason.xentonic.org/ttl/ttl21.html |title=Van de spiegheling der singconst |publisher=Diapason.xentonic.org |date=2009-06-30 |access-date=2012-12-29 |archive-url=https://web.archive.org/web/20110717015203/http://diapason.xentonic.org/ttl/ttl21.html |archive-date=17 July 2011 |url-status=dead }}</ref> however, due to insufficient accuracy of his calculation, many of the numbers (for string length) he obtained were off by one or two units from the correct values.<ref>Christensen, Thomas S. (2006). ''The Cambridge History of Western Music Theory'', p.205, Cambridge University Press. {{ISBN|9781316025482}}.</ref> He appears to have been inspired by the writings of the Italian [[lutenist]] and musical theorist [[Vincenzo Galilei]] (father of [[Galileo Galilei]]), a onetime pupil of [[Gioseffo Zarlino]].